Two-stroke internal-combustion engine



Aug. 21, 1923. 1,465,885

W. J. F. WEGE TWOVSTROKE INTERNAL COMBUSTION ENGINE Filed Nov. .18, 1920 2 Sheets-Sheet 1 Aug. 21', 1923.

W. J. F. WEGE TWO-STROKE INTERNAL COMBUSTION ENGINE 1920 2 shoots-Shoot 2 Filed Nov. 18

Wag: ArraF/VEXS INVENW MALI/1M Mi.

Patented Aug. 21, 192.3.

UNITE I nssrenon TO THE WEGE MOT nUsrn LIA.

To all whom it may concern:

Be it known that 1, WILLIAM RICK VEGFJ, a subject of the King of Great Britain and Ireland, residing at 67 Third Avenue, St. Peters, State of South Australia, Commonwealth of Australia, have invented a certain new and useful Two- Stroke Internal-Combustion Engine, .of which the following is a specification. This invention comprises a two-stroke internal-combustion engine for use with oil, petrol, alcohol, benzine or other Volatile fuel, and is especially adapted for use in motor cars, aeroplanes and motor cycles.

It is very simple in construction and. in operation and has no valves other than port valves. All valve operating gears consisting of cams, camshafts, tappets, tappet rods, rockers, valve guides, valve timing wheels, '20 and springs have been eliminated.

In. order that my invention may-be clearly understood I will describe the same with reference to the accompanying drawings in which I have shown iii-Figs. 1,2, 3 and 4: a single block of three cylinders, and in Fig. 5 two such blocks placed at an angle of 60. In Figs. 1 and 5 I have shownthe crank shaft and crank case for two blocks forming a 6 cylinder engine.

Fig. 1 is a central vertical-longitudinal section upon line a b of Fig.3 of the cylinders and crank case but showing the pistons in full.

Fig. 2 is a central verticallongitudinal section, also upon line a b of Fig. 3, of the cylinder casting only, showing in dotted lines the position of the several passages.

Fig. 8 is a plan vie 'ing only. V V

Fig. 4: is a horizontal section upon line 0 d :of Fig. 2 of the cylinder casting only, showing the inlet ports and passages for the gaseous mixture and the outlet ports and ll passages for the burnt gases. I Fig. 5 is acentral Vertical cross section of the' cr-ank case and two blocks of cylinders and pistons.

As shown int he drawings each of the 1 cylinders comprise two parts 5 and 6 .arranged in tandem,- the part 5 of smaller diameter forming the power cylinder, and the part 6 of larger diameter forming the induction and compression cylinder. induction and compression cylinder strictly rare Application filed November 18,1920. serial 1%. 425,013." r I JOHN FRED-f stroke.

with a priming plug 10.

out the burnt gases.

w of the cylinder castplace in the crank case,

The

' FWD-STROKE INTERNAL-COMBUSTTON ENGINE. V

y The several pistons are crankshaft [21 by connecting rods 22..

4 .The induction port19 whereby the gaseous mixture is admitted to theinduction and compression cylinder 6" from the carburettor issituated in the lower part of the" wallof the cylinder, and theinduction ports 19 of the-several cylinders are connected with the carburettor bymeans ofan induction passage 23. in'the wallof the unit. 5111 1,455.85 pastes ff WILLIAM JOHN FREDRICK WEG-E, or s'r. rnrnns, soU'rH'nusrnALrA,AUSTRALIA,

orv LIMITED, or ADELAIDE, SOUTH'A'US'IRALIA,3

V speaking is an annularchamber-which is, formed between-the cylinder wall and the smaller piston as the latter moves downward from the power cylinder during each- The power cylinders are enclosedwithina water jacket :7 with water .outlet 8 and suitable inlet notl-shown, and at the top of. each cylinder is an opening fitted The pistons are of the trunk type. hEach of them comprises two parts 11 and 12 corresponding to ,the tw0-,;parts,5 and fi respectively of the cylinder, the'part 11 form ing the power piston and-thepart12 forming the induction and compression piston. The smaller portion 11 has several piston rings 13 set into it near its outer end, also a battle 1 1- preferably formed as anintegral portion of thecasting projecting from its. top or outer face upon theisicle which passes the inlet port 16. The rings 13 not only. prevent loss of power but also prevent the passing of gasesfrom the power cylinder 5 to the compression cylinder 6., The baffle 14 directs the incoming charge of mixture to th p. of the cylinder thereby forcing.

connected -to the cep 'The larger portion 12v of the,pi'ston has j a ring 17 set into it near its outer end, also an extended sleeve 18 fitting within the cylinder. The ring 17,1not only ensureseffective suction and compression-in the cylinder 12 but also prevents} the passage of mixture into the crankcase 20. when the piston [is atthe bottom of its stroke the sleeve. 18 closes the-induction port 19. .Tt prevents any communication between the carburettor and the crank case 20. The effect of this construction is that the gaseous mixture. does not. at any time enter the crank case, nor is any air drawn therefrom, nor doesany compression take Fig. Thave shownzthe induction passages V inder is a gaseous mixture delivery port 15 whereby the mixture is delivered from the compression cyl1nder,...-these.ports beingicon- I cylinder "'below" powencylinder No.-. 1 de nected by passages in .the wall of the unit with gas inlet ports 16'near the lowerend of the power cylinders 5. The compression livers mixture topower cylinder No. 2; that below"- No; 2 delivers to No: and that below No.8delivers to *No. 1. The exhaust port 26 of each power cylinder is positioned nearthe bottom of same on the opposite side to" the inlet port l6and slightly nearer'the' outer-end of-"-the'--cylinder than the-inlet portjis. r

The oil pump which supplies or circulates the necessary'lubricating oil to my engine" is mou'nted upon the wallfof one of the compression cylinders. It comprises two concave cups 27"with a diaphragm- 28 of suit ableflexible-material such as leather, or very" thin metal clampedbetween them. The chamber at one side of the diaphragm communicateswith' a check valve 29 having intake-and' delivery ballvalves 30 and-31" V p crank case. l/Vith'thisin view 'it is obvious and having suitable pipe connections there from to the oilsupply and to the crank phragm' isfcperatedby th troughs-pf -the engine respectively.- These connections vare*not* shownin the drawings. T'he-chambenat" the -other'side of the diaat abou'tthe centre of same so thatthediaand compression therein.-- Theengineis fitted with-a carburettor of anyapproved type and with a magneto of the-ordinary high tension type driven from big 'e'nddi'ppersu The operation of my-engine as folinduction and compression cylinder until" the? engine shaft; The mixture in each cylinder is-fired by a'sparkingplugofany approved-type secured in'the'opening 32.

The'cranks'haftis ofthe three'throw type Upon the firing of a charge in" No. 1 power cylinder the piston --is driven downward-and'fa partialvacuum is caused= in the the: piston" therein uncovers) the induction port- 19 whereupon gaseous ixt flows HQ n 23::and into the y r. Simultaneously tromthe carburettoralong the induction pipe the po'wer piston; as it'nears thebottom of its'stroke; uncovers the discharge port 26 and the inlet -p.ort l6.

-The burnt gasesescape from the-port 26:

alternate suction and compressed mixture flows from compression cylinder No. 3 along the passage and through the port 16 into the power cylinder No. 1 thus assisting the escapeo tburnt gases. I

Upon its upstroke the power pisto'ncloses the ports 26 and 16 and as it rises it further compresses the-mixturezand when it reaches the topthe mixture 'is fired by the sparking plug. Simultaneously the induction and 7 compression piston closes the induction port 19 and the mixture is compressed in the compression cylinder from K which it is (a little later-when the piston-No. 2 descends) delivered through'the outlet port; 15 and '80 along the connecting passage and through the I inlet-port 16 to} the power cylinder- N0. 2. Therseveraloperations of thepiston= transmit alternate suction and compression impulses to the diaphragm 2'8f'otthepum'p" 8 thus causing it'- to- -be sufliciently deflected byea-ch stroke to promote-and maintain a circulation of thelub-rioating oilfy Similar operations take place in the other cylinders.

It is; also pointed outthafi the enlarged portion *or extended skirt portion of each"- piston projects intothe crank case and; con- R sequently is coveredwith oil i splashed inthe crank or with oil mist':preseht'in: -the* V that-the oil pump could be dispensed with.

It should be further 1 here noted that} the-- period of vacuum in each compression' or" induction cylinder is greater than 'thepe rio'd of compression in; said cylinder; and that consequently the oil' splashed on thepo'rtion of .the extended skirt which pro jec-ts into thecrank casefis drawnup into? i said cylinder and transferred to the gmlX 'ture into the respective power cylinder and thus eliminatingh any possibility of lithe oil being ''-forced back iii-tothe' crank ca'se on the compression stroke. r 1 hat I claim -isz 1 A two-stroke internalcombustion engine havingsplash lubrication and havingeyla inders each comprising: two portions of djiif fe'rent diameters and arranged inlt an'de'rn, the part of smaller diameter in each install-ice; being most distant from the cranki shali't and forming the power chamber, and the" part of" la rgerdiameter forming the induction compression chamber, the walls of the cylinders having communicating ports ewher'e' by the-compression chamber of the onegscylinder is connected with the powencha'nibe r j of another cylinder, and anfeatendecl skirt upon each'compression pistonadaptedktoex H tend into the crank case eas the -said"piston-i 5 nioves'to the bottom of its stroke; sothat'l'the' ing :greater: than the period of compressione and continuing until the extended skirt has my invention I have'signedmy name in the projected into the crank case, so that the oil presence of two subscribing Witnesses this is thereby drawn up from the said extended fourth day of October, 1920. I skirt into the compression cylinder 'and WILLIAM JOHN FREDRICK W561i;v 5 transferred with the mixture to the respec- Witnesses :7 I

tive power cylinder. ARTHUR GonnGonnrsoN,

In testimony that I claim the foregoing as KATHLEEN MARY COLLISONQ 

